JPH0523601U - Microwave converter - Google Patents
Microwave converterInfo
- Publication number
- JPH0523601U JPH0523601U JP7042591U JP7042591U JPH0523601U JP H0523601 U JPH0523601 U JP H0523601U JP 7042591 U JP7042591 U JP 7042591U JP 7042591 U JP7042591 U JP 7042591U JP H0523601 U JPH0523601 U JP H0523601U
- Authority
- JP
- Japan
- Prior art keywords
- shield
- primary radiator
- circuit
- signal
- circuit board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
(57)【要約】
【目的】 処理信号周波数の異なる信号処理回路間での
電磁波を介しての信号の回り込みを、簡単な構造で防止
できるマイクロ波コンバ−タを提供すること。
【構成】 直方体形状の導波管よりなる一次放射器１１
に嵌合し且つ導通接触する断面Ｌ字形状のシ−ルドシャ
−シ１２の水平片121 及び垂直片122 のそれぞれに凹部
121a,122a,122bを形成し、これらの凹部に高周波増幅回
路及びミキサ回路が形成された回路基板１３、局部発振
回路が形成された回路基板１４、中間周波増幅回路が形
成された回路基板１５を分割配置する。さらに、一次放
射器及びシ−ルドシャ−シに導通接触するように、全体
にシ−ルドケ−ス１９を外嵌する。
【効果】 各回路基板を個別のシ−ルド部材によって遮
蔽する必要が無いので、組み立て作業の手間を省くこと
ができると共に、部品点数を削減することができ、コス
トの低下を図ることができる。
(57) [Abstract] [PROBLEMS] To provide a microwave converter capable of preventing signal wraparound via an electromagnetic wave between signal processing circuits having different processing signal frequencies with a simple structure. [Structure] Primary radiator 11 comprising a rectangular parallelepiped waveguide
Recessed in each of the horizontal piece 121 and the vertical piece 122 of the shield chassis 12 having an L-shaped cross section which is fitted into and is in conductive contact with.
121a, 122a, 122b are formed, and a circuit board 13 having a high-frequency amplifier circuit and a mixer circuit formed in these recesses, a circuit board 14 having a local oscillator circuit formed therein, and a circuit board 15 having an intermediate-frequency amplifier circuit formed therein. Divide and arrange. Further, a shield case 19 is fitted on the whole so as to make conductive contact with the primary radiator and the shield chassis. [Effect] Since it is not necessary to shield each circuit board with an individual shield member, it is possible to save the labor of the assembling work, reduce the number of parts, and reduce the cost.
Description
【０００１】[0001]
本考案は、衛星放送等の受信用に用いるマイクロ波コンバ−タの改良に関する ものである。 The present invention relates to an improvement of a microwave converter used for receiving satellite broadcasting and the like.
【０００２】[0002]
近年、衛生放送の受信が盛んに行われるようになり、受信用アンテナに設けら れるマイクロ波コンバ−タが重要な装置として知られている。図２はこの種の従 来のマイクロ波コンバ−タの一例を示す分解斜視図である。 図において、１は導波管よりなる一次放射器で、略直方体形状の外形を有し、 電磁波を入射する開口端の周囲には固定用のフランジ１ａが形成されている。ま た、一次放射器１の上面１ｂ及び両側面１ｃ，１ｄには、それぞれの面１ｂ〜１ ｄに沿って、信号処理回路が形成された回路基板２〜４が固定されている。これ らの回路基板２〜４は、信号処理回路が一次放射器１から絶縁された状態で固定 され、回路基板２には高周波増幅回路及びミキサ回路が形成され、回路基板３に は局部発振回路が、また回路基板４には中間周波増幅回路がそれぞれ形成されて いる。 In recent years, reception of sanitary broadcasting has become popular, and a microwave converter provided in a receiving antenna is known as an important device. FIG. 2 is an exploded perspective view showing an example of a conventional microwave converter of this type. In the figure, reference numeral 1 denotes a primary radiator composed of a waveguide, and has a substantially rectangular parallelepiped outer shape, and a fixing flange 1a is formed around the opening end where electromagnetic waves are incident. Further, on the upper surface 1b and both side surfaces 1c and 1d of the primary radiator 1, circuit boards 2 to 4 on which signal processing circuits are formed are fixed along the respective surfaces 1b to 1d. These circuit boards 2 to 4 are fixed in a state where the signal processing circuit is insulated from the primary radiator 1, a high frequency amplifier circuit and a mixer circuit are formed on the circuit board 2, and a local oscillation circuit is formed on the circuit board 3. However, an intermediate frequency amplifier circuit is formed on the circuit board 4, respectively.
【０００３】 さらに、回路基板２〜４のそれぞれは一次放射器１に固定されたシ−ルド部材 ５〜７によって覆われている。また、一次放射器１及び回路基板２〜４は、一端 が開口された直方体形状のシ−ルドケ−ス８の中に挿入され、シ−ルドケ−ス８ の開口部８ａの周囲に一次放射器１のフランジ１ａがねじにより固定される。Further, each of the circuit boards 2 to 4 is covered with shield members 5 to 7 fixed to the primary radiator 1. The primary radiator 1 and the circuit boards 2 to 4 are inserted into a rectangular parallelepiped shield case 8 having an opening at one end, and the primary radiator is provided around the opening 8a of the shield case 8. The first flange 1a is fixed by a screw.
【０００４】 前述の構成よりなるマイクロ波コンバ−タによれば、一次放射器１によって受 信されたマイクロ波は図示せぬプロ−ブピンを介して高周波増幅回路に入力され る。高周波増幅回路に入力されたマイクロ波信号は増幅された後、ミキサ回路に 入力され、ミキサ回路において局部発振回路から出力される信号と混合されて、 中間周波数の信号に変換される。この中間周波信号は中間周波増幅回路で増幅さ れた後、一次放射器１の後端部に設けられたコネクタ（図示せず）を介して図示 せぬチュ−ナ等の外部装置に出力される。これにより、衛星放送の信号は、伝送 及び信号処理を行い易い周波数の信号に変換される。According to the microwave converter having the above-described structure, the microwave received by the primary radiator 1 is input to the high frequency amplifier circuit via a probe pin (not shown). The microwave signal input to the high-frequency amplifier circuit is amplified, then input to the mixer circuit, mixed with the signal output from the local oscillator circuit in the mixer circuit, and converted into an intermediate frequency signal. This intermediate frequency signal is amplified by an intermediate frequency amplifier circuit and then output to an external device such as a tuner (not shown) via a connector (not shown) provided at the rear end of the primary radiator 1. It As a result, the satellite broadcast signal is converted into a signal of a frequency that facilitates transmission and signal processing.
【０００５】[0005]
しかしながら、前述した従来のマイクロ波コンバ−タにおいては、処理信号周 波数の異なる信号処理回路間での電磁波を介しての信号の回り込み、特に局部発 振回路から発振される局部発振周波数の他回路への回り込み或いは一次放射器１ を介しての外部への輻射は多大な悪影響を及ぼす。これらの信号の回り込みを防 ぐために、各信号処理回路をシ−ルド部材によって覆っているので、部品点数が 増え、組み立て作業時の手間がかかると共に、コストが増加するという問題点が あった。 However, in the above-mentioned conventional microwave converter, signals sneak through electromagnetic waves between signal processing circuits having different processing signal frequencies, particularly other circuits of the local oscillation frequency oscillated from the local oscillation circuit. Radiation to the outside or radiation to the outside via the primary radiator 1 has a great adverse effect. Since each signal processing circuit is covered by a shield member in order to prevent these signals from wrapping around, there is a problem that the number of parts is increased, labor is required during assembly work, and cost is increased.
【０００６】 本考案の目的は上記の問題点に鑑み、処理信号周波数の異なる信号処理回路間 での電磁波を介しての信号の回り込みを、簡単な構造で防止できるマイクロ波コ ンバ−タを提供することにある。In view of the above problems, an object of the present invention is to provide a microwave converter capable of preventing signal wraparound via electromagnetic waves between signal processing circuits having different processing signal frequencies with a simple structure. To do.
【０００７】[0007]
本考案は上記の目的を達成するために、導波管よりなる一次放射器を備え、処 理信号周波数の異なる複数の信号処理回路を前記一次放射器の外面に沿って配設 してなるマイクロ波コンバ−タにおいて、前記一次放射器に外接すると共に、前 記信号処理回路を処理信号周波数に対応して前記一次放射器の周方向に遮蔽分割 して配置するシ−ルドシャ−シを設け、前記シ−ルドシャ−シの外周を、前記シ −ルドシャ−シに導通接触するシ−ルドケ−スにて覆ってなるマイクロ波コンバ −タを提案する。 In order to achieve the above-mentioned object, the present invention comprises a primary radiator composed of a waveguide, and a plurality of signal processing circuits having different processing signal frequencies are arranged along the outer surface of the primary radiator. In the wave converter, a shield chassis is provided, which is circumscribed to the primary radiator, and which is arranged so as to shield and divide the signal processing circuit in the circumferential direction of the primary radiator in correspondence with the processing signal frequency. A microwave converter is proposed in which the outer periphery of the shield chassis is covered with a shield case which is in conductive contact with the shield chassis.
【０００８】[0008]
本考案によれば、処理信号周波数の異なる複数の信号処理回路は、シ−ルドシ ャ−シにより前記処理信号周波数に対応して一次放射器の周方向に遮蔽分割され ると共に、前記一次放射器の外面に沿って配置される。さらに、前記シ−ルドシ ャ−シは前記一次放射器に外接されると共に、前記シ−ルドシャ−シの外周は前 記シ−ルドシャ−シに導通接触するシ−ルドケ−スによって覆われる。これによ り、各信号処理回路は、前記一次放射器、シ−ルドシャ−シ及びシ−ルドケ−ス によって個別に遮蔽され、信号処理回路間での電磁波を介しての信号の回り込み が防止される。 According to the present invention, a plurality of signal processing circuits having different processed signal frequencies are shield-divided in the circumferential direction of the primary radiator by a shield chassis in accordance with the processed signal frequency, and the primary radiator is also divided. Are arranged along the outer surface of the. Further, the shield chassis is circumscribed by the primary radiator, and the outer circumference of the shield chassis is covered by a shield case which is in conductive contact with the shield chassis. As a result, each signal processing circuit is individually shielded by the primary radiator, the shield chassis, and the shield case, and the signal is prevented from wrapping through the electromagnetic waves between the signal processing circuits. It
【０００９】[0009]
以下、図面に基づいて本考案の実施例を説明する。 図１は本考案の一実施例を示す分解斜視図、図３は一実施例の正面断面図であ る。図において、１１は導波管よりなる一次放射器で、略直方体形状の外形を有 し、電磁波を入射する開口端の周囲には固定用のフランジ１１ａが形成されてい る。１２はシ−ルドシャ−シで、例えば断面Ｌ字形状に形成されたアルミニウム からなり、その水平片121 及び垂直片122 のそれぞれの長さは一次放射器１１の 長さとほぼ等しく形成されると共に、水平片121 は一次放射器１１の上面１１ｂ に、また垂直片122 は一次放射器１１の一側面１１ｃにそれぞれ当接され、電気 的に導通状態となるようになっている。また、一次放射器１１にシ−ルドシャ− シ１２を組み合わせた状態で、これらは直方体形状をなすようになっている。さ らに、フランジ１１ａは、一次放射器１１にシ−ルドシャ−シ１２を組み合わせ た状態で上下左右方向に所定幅突出する形状に設定されている。 An embodiment of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view showing an embodiment of the present invention, and FIG. 3 is a front sectional view of the embodiment. In the figure, reference numeral 11 denotes a primary radiator composed of a waveguide, and has a substantially rectangular parallelepiped outer shape, and a fixing flange 11a is formed around the opening end where electromagnetic waves are incident. Numeral 12 is a shield chassis made of, for example, aluminum having an L-shaped cross section, and the lengths of the horizontal piece 121 and the vertical piece 122 are substantially equal to the length of the primary radiator 11, and The horizontal piece 121 is brought into contact with the upper surface 11b of the primary radiator 11, and the vertical piece 122 is brought into contact with one side surface 11c of the primary radiator 11 so that they are electrically connected. Further, in the state where the shield chassis 12 is combined with the primary radiator 11, these have a rectangular parallelepiped shape. Furthermore, the flange 11a is set to have a shape protruding in the vertical and horizontal directions by a predetermined width in a state in which the primary radiator 11 and the shield chassis 12 are combined.
【００１０】 一方、シ−ルドシャ−シ１２の水平片121 の上面には所定深さの矩形状の凹部 121aが形成され、垂直変122 の左右両側面にはそれぞれ所定深さの矩形状の凹部 122a,122b が形成されている。これらの凹部121a,122a,122bには、回路基板１３ ，１４，１５がそれぞれ挿入配置され、シ−ルドシャ−シ１２にねじ止め等によ って固定されている。ここで、回路基板１２には高周波増幅回路及びミキサ回路 が形成され、回路基板１３には局部発振回路が、また回路基板１４には中間周波 増幅回路がそれぞれ形成されている。これらの回路基板１３，１４，１５の間の 接続はシ−ルドシャ−シ１２に形成された貫通孔１６ａ，１６ｂを介してなされ 、貫通孔１６ａ，１６ｂに挿入された接続線１７の周囲には所定の誘電体１８が 充填されている。On the other hand, a rectangular recess 121a having a predetermined depth is formed on the upper surface of the horizontal piece 121 of the shield chassis 12, and rectangular recesses having a predetermined depth are formed on the left and right side surfaces of the vertical change 122, respectively. 122a and 122b are formed. The circuit boards 13, 14 and 15 are inserted and arranged in the recesses 121a, 122a and 122b, respectively, and are fixed to the shield chassis 12 by screwing or the like. Here, a high frequency amplifier circuit and a mixer circuit are formed on the circuit board 12, a local oscillation circuit is formed on the circuit board 13, and an intermediate frequency amplifier circuit is formed on the circuit board 14. The connection between these circuit boards 13, 14 and 15 is made through through holes 16a and 16b formed in the shield chassis 12, and around the connection line 17 inserted into the through holes 16a and 16b. It is filled with a predetermined dielectric material 18.
【００１１】 回路基板１３〜１５が装着されたシ−ルドシャ−シ１２が組み付けられた一次 放射器１１には、前面に開口部１９ａが形成された直方体形状のシ−ルドケ−ス １９が一次放射器１１及びシ−ルドシャ−シ１２に導通接触するように外嵌され 、一次放射器１１のフランジ１１ａがシ−ルドケ−ス１９の開口部１９ａの周囲 にねじ等によって固定される。この際、フランジ１１ａとシ−ルドケ−ス１９と の間にパッキン（図示せず）等が介在され防滴構造とされている。The primary radiator 11 in which the shield chassis 12 having the circuit boards 13 to 15 mounted thereon is assembled is provided with a rectangular parallelepiped shield case 19 having an opening 19a formed in the front surface thereof. The flange 11a of the primary radiator 11 is fitted onto the container 11 and the shield chassis 12 so as to be in conductive contact therewith, and is fixed around the opening 19a of the shield case 19 by screws or the like. At this time, a packing (not shown) or the like is interposed between the flange 11a and the shield case 19 to form a drip-proof structure.
【００１２】 また、シ−ルドシャ−シ１２の水平片121 の所定位置には貫通孔（図示せず） が形成され、一次放射器１１に設けられたプロ−ブピン１１ｄが挿通されて高周 波増幅回路のフロントエンドに接続されている。さらに、シ−ルドケ−ス１９の 背面にはコネクタ挿通用の穴（図示せず）が形成されており、一次放射器１１の 背面に設けられたコネクタ（図示せず）を介して、中間周波増幅回路からの出力 信号が外部装置に出力できるようになっている。Further, a through hole (not shown) is formed at a predetermined position of the horizontal piece 121 of the shield chassis 12, and a probe pin 11d provided on the primary radiator 11 is inserted therethrough so that a high frequency wave is generated. It is connected to the front end of the amplifier circuit. Further, a hole (not shown) for inserting a connector is formed on the rear surface of the shield case 19, and the intermediate frequency is fed through a connector (not shown) provided on the rear surface of the primary radiator 11. The output signal from the amplifier circuit can be output to an external device.
【００１３】 前述の構成よりなるマイクロ波コンバ−タによれば、一次放射器１１によって 受信されたマイクロ波はプロ−ブピン１１ｄを介して高周波増幅回路に入力され る。高周波増幅回路に入力されたマイクロ波信号は増幅された後、ミキサ回路に 入力され、ミキサ回路において局部発振回路から出力される信号と混合されて、 中間周波数の信号に変換される。この中間周波信号は中間周波増幅回路で増幅さ れた後、コネクタを介して図示せぬチュ−ナ等の外部装置に出力される。これに より、衛星放送の信号は、伝送及び信号処理を行い易い周波数の信号に変換され る。According to the microwave converter configured as described above, the microwave received by the primary radiator 11 is input to the high frequency amplifier circuit via the probe pin 11d. The microwave signal input to the high-frequency amplifier circuit is amplified, then input to the mixer circuit, mixed with the signal output from the local oscillator circuit in the mixer circuit, and converted into an intermediate frequency signal. This intermediate frequency signal is amplified by an intermediate frequency amplifier circuit and then output to an external device such as a tuner (not shown) via a connector. As a result, the satellite broadcast signal is converted into a signal of a frequency that facilitates transmission and signal processing.
【００１４】 また、前述したマイクロ波コンバ−タの構造によれば、組み立てた状態におい てシ−ルドシャ−シ１２は一次放射器１１及びシ−ルドケ−ス１９に導通接触し 、各凹部121a,122a,122bの内部は一次放射器１１、シ−ルドシャ−シ１２及びシ −ルドケ−ス１９によって外部からほぼ完全に遮蔽される。これにより、処理信 号周波数の異なる信号処理回路間、即ち回路基板１３〜１５間での電磁波を介し ての信号の回り込み等を防止することができる。さらに、組み立て作業の際に、 従来のように各回路基板１３〜１５毎にこれらを覆うシ−ルド部材を取り付ける 必要が無いので、作業の手間を省くことができると共に、部品点数を削減するこ とができ、コストの低下を図ることができる。さらにまた、回路基板１３〜１５ を一次放射器１１の周囲に分割配置しているので、全体の形状を小型に形成する ことができる。Further, according to the structure of the microwave converter described above, in the assembled state, the shield chassis 12 makes conductive contact with the primary radiator 11 and the shield case 19, and the recesses 121a, The insides of 122a and 122b are almost completely shielded from the outside by the primary radiator 11, the shield chassis 12, and the shield case 19. As a result, it is possible to prevent signals from wrapping around between the signal processing circuits having different processing signal frequencies, that is, between the circuit boards 13 to 15 via electromagnetic waves. Further, since it is not necessary to attach a shield member for covering each of the circuit boards 13 to 15 at the time of assembling work, it is possible to save labor and reduce the number of parts. Therefore, the cost can be reduced. Furthermore, since the circuit boards 13 to 15 are divided and arranged around the primary radiator 11, the overall shape can be made small.
【００１５】 尚、前述した各部の形状は一例であり、これに限定されないことは言うまでも ないことである。Needless to say, the shapes of the above-mentioned parts are merely examples, and the present invention is not limited to these.
【００１６】[0016]
以上説明したように本考案によれば、各信号処理回路は、前記一次放射器、シ −ルドシャ−シ及びシ−ルドケ−スによって個別に遮蔽され、信号処理回路間で の電磁波を介しての信号の回り込みが防止されるので、従来のように信号処理回 路毎に個別にシ−ルド部材等によって遮蔽する必要がない。これにより、組み立 て作業の手間を省くことができると共に、部品点数を削減することができ、コス トの低下を図ることができる。さらにまた、各信号処理回路を一次放射器の周囲 に分割配置しているので、全体の形状を小型に形成することができるという簡単 な構造にして優れた効果を奏するものである。 As described above, according to the present invention, each signal processing circuit is individually shielded by the primary radiator, the shield chassis, and the shield case, and the electromagnetic wave between the signal processing circuits is used. Since the signal is prevented from wrapping around, it is not necessary to individually shield each signal processing circuit by a shield member or the like as in the conventional case. As a result, the labor of assembling work can be saved, the number of parts can be reduced, and the cost can be reduced. Furthermore, since each signal processing circuit is divided and arranged around the primary radiator, a simple structure in which the entire shape can be formed in a small size has an excellent effect.
【図１】本考案の一実施例を示す分解斜視図FIG. 1 is an exploded perspective view showing an embodiment of the present invention.
【図２】従来例を示す分解斜視図FIG. 2 is an exploded perspective view showing a conventional example.
【図３】本考案の一実施例の正面断面図FIG. 3 is a front sectional view of an embodiment of the present invention.
１１…一次放射器、１１ａ…フランジ、１１ｄ…プロ−
ブピン、１２…シ−ルドシャ−シ、121 …水平片、122
…垂直片、121a,122a,122b…凹部、１３〜１５…回路基
板、１６ａ，１６ｂ…貫通孔、１７…接続線、１８…誘
電体、１９…シ−ルドケ−ス、１９ａ…開口部。11 ... Primary radiator, 11a ... Flange, 11d ... Pro-
Bupin, 12 ... Shield chassis, 121 ... Horizontal piece, 122
... Vertical pieces, 121a, 122a, 122b ... Recesses, 13 to 15 ... Circuit boards, 16a, 16b ... Through holes, 17 ... Connection lines, 18 ... Dielectric material, 19 ... Shield case, 19a ... Opening.
Claims (1)
信号周波数の異なる複数の信号処理回路を前記一次放射
器の外面に沿って配設してなるマイクロ波コンバ−タに
おいて、 前記一次放射器に外接すると共に、前記信号処理回路を
処理信号周波数に対応して前記一次放射器の周方向に遮
蔽分割して配置するシ−ルドシャ−シを設け、 前記シ−ルドシャ−シの外周を、前記シ−ルドシャ−シ
に導通接触するシ−ルドケ−スにて覆ってなる、 ことを特徴とするマイクロ波コンバ−タ。1. A microwave converter comprising a primary radiator made of a waveguide, wherein a plurality of signal processing circuits having different processing signal frequencies are arranged along an outer surface of the primary radiator. A shield chassis is provided which is circumscribed to the radiator and shields and divides the signal processing circuit in the circumferential direction of the primary radiator corresponding to the processed signal frequency, and the outer periphery of the shield chassis is provided. A microwave converter covered with a shield case which is in conductive contact with the shield chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7042591U JPH0523601U (en) | 1991-09-03 | 1991-09-03 | Microwave converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7042591U JPH0523601U (en) | 1991-09-03 | 1991-09-03 | Microwave converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0523601U true JPH0523601U (en) | 1993-03-26 |
Family
ID=13431116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7042591U Withdrawn JPH0523601U (en) | 1991-09-03 | 1991-09-03 | Microwave converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0523601U (en) |
-
1991
- 1991-09-03 JP JP7042591U patent/JPH0523601U/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19951130 |